From: Namhyung Kim <namhyung@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>,
Lai Jiangshan <laijs@cn.fujitsu.com>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
torvalds@linux-foundation.org, paulmck@linux.vnet.ibm.com,
tglx@linutronix.de, akpm@linux-foundation.org, riel@redhat.com,
mgorman@suse.de, oleg@redhat.com, mingo@redhat.com,
minchan@kernel.org, kamezawa.hiroyu@jp.fujitsu.com,
viro@zeniv.linux.org.uk, dave@stgolabs.net,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [RFC][PATCH 0/6] Another go at speculative page faults
Date: Tue, 28 Oct 2014 14:32:16 +0900 [thread overview]
Message-ID: <87mw8g7o9r.fsf@sejong.aot.lge.com> (raw)
In-Reply-To: <20141024131440.GZ21513@worktop.programming.kicks-ass.net> (Peter Zijlstra's message of "Fri, 24 Oct 2014 15:14:40 +0200")
Hi Peter,
On Fri, 24 Oct 2014 15:14:40 +0200, Peter Zijlstra wrote:
> On Fri, Oct 24, 2014 at 09:54:23AM +0200, Ingo Molnar wrote:
>>
>> * Peter Zijlstra <peterz@infradead.org> wrote:
>> > Its what I thought initially, I tried doing perf record with and
>> > without, but then I ran into perf diff not quite working for me and I've
>> > yet to find time to kick that thing into shape.
>>
>> Might be the 'perf diff' regression fixed by this:
>>
>> 9ab1f50876db perf diff: Add missing hists__init() call at tool start
>>
>> I just pushed it out into tip:master.
>
> I was on tip/master, so unlikely to be that as I was likely already
> having it.
>
> perf-report was affected too, for some reason my CONFIG_DEBUG_INFO=y
> vmlinux wasn't showing symbols (and I double checked that KASLR crap was
> disabled, so that wasn't confusing stuff either).
>
> When I forced perf-report to use kallsyms it works, however perf-diff
> doesn't have that option.
>
> So there's two issues there, 1) perf-report failing to generate useful
> output and 2) per-diff lacking options to force it to behave.
Did the perf-report fail to show any (kernel) symbols or are they wrong
symbols? Maybe it's related to this:
https://lkml.org/lkml/2014/9/22/78
Thanks,
Namhyung
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next prev parent reply other threads:[~2014-10-28 5:32 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-20 21:56 [RFC][PATCH 0/6] Another go at speculative page faults Peter Zijlstra
2014-10-20 21:56 ` [RFC][PATCH 1/6] mm: Dont assume page-table invariance during faults Peter Zijlstra
2014-10-20 21:56 ` [RFC][PATCH 2/6] mm: Prepare for FAULT_FLAG_SPECULATIVE Peter Zijlstra
2014-10-20 21:56 ` [RFC][PATCH 3/6] mm: VMA sequence count Peter Zijlstra
2014-10-22 11:26 ` Kirill A. Shutemov
2014-10-22 11:39 ` Peter Zijlstra
2014-10-22 11:53 ` Kirill A. Shutemov
2014-10-22 12:15 ` Peter Zijlstra
2014-10-22 13:44 ` Peter Zijlstra
2014-10-23 12:36 ` Kirill A. Shutemov
2014-10-23 14:22 ` Peter Zijlstra
2014-10-23 15:05 ` Kirill A. Shutemov
2014-10-20 21:56 ` [RFC][PATCH 4/6] SRCU free VMAs Peter Zijlstra
2014-10-20 23:41 ` Linus Torvalds
2014-10-21 8:07 ` Peter Zijlstra
2014-10-24 15:16 ` Christoph Lameter
2014-10-24 15:51 ` Peter Zijlstra
2014-10-24 17:08 ` Christoph Lameter
2014-10-21 8:22 ` Peter Zijlstra
2014-10-23 10:14 ` Lai Jiangshan
2014-10-23 11:03 ` Peter Zijlstra
2014-10-24 3:33 ` Lai Jiangshan
2014-10-24 7:26 ` Peter Zijlstra
2014-10-20 21:56 ` [RFC][PATCH 5/6] mm: Provide speculative fault infrastructure Peter Zijlstra
2014-10-21 8:35 ` Kirill A. Shutemov
2014-10-21 10:41 ` Peter Zijlstra
2014-10-21 19:00 ` Peter Zijlstra
2014-10-20 21:56 ` [RFC][PATCH 6/6] mm,x86: Add speculative pagefault handling Peter Zijlstra
2014-10-21 0:07 ` [RFC][PATCH 0/6] Another go at speculative page faults Andy Lutomirski
2014-10-21 8:11 ` Peter Zijlstra
2014-10-21 16:23 ` Ingo Molnar
2014-10-21 17:09 ` Kirill A. Shutemov
2014-10-21 17:56 ` Peter Zijlstra
2014-10-23 10:40 ` Lai Jiangshan
2014-10-23 11:04 ` Peter Zijlstra
2014-10-24 7:54 ` Ingo Molnar
2014-10-24 13:14 ` Peter Zijlstra
2014-10-28 5:32 ` Namhyung Kim [this message]
2014-10-21 17:25 ` Peter Zijlstra
2014-10-22 12:35 ` Ingo Molnar
2014-10-22 7:34 ` Davidlohr Bueso
2014-10-22 11:29 ` Kirill A. Shutemov
2014-10-22 11:45 ` Peter Zijlstra
2014-10-22 11:55 ` Kirill A. Shutemov
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